Sulfite reductase (flavoprotein alpha-subunit); Component of the sulfite reductase complex that catalyzes the 6-electron reduction of sulfite to sulfide. This is one of several activities required for the biosynthesis of L-cysteine from sulfate. The flavoprotein component catalyzes the electron flow from NADPH -> FAD -> FMN to the hemoprotein component (Probable).

Putative phospho-adenylylsulfate sulfotransferase; Reduction of activated sulfate into sulfite; Belongs to the PAPS reductase family. CysH subfamily.

Cysteine synthase; Catalyzes the conversion of O-acetylserine to cysteine. Also acts as a sensor of cysteine availability in the signal transduction pathway modulating CymR activity. When cysteine is present, the pool of O-acetylserine (OAS) is low, which leads to the formation of a CymR- CysK complex and transcriptional repression of the CymR regulon occurs. In the absence of cysteine, the OAS pool is high and the CymR-CysK complex is mostly dissociated, leading to a faster dissociation of CymR from its DNA targets and the lifting of CymR-dependent repression.

Adenylylsulfate kinase; Catalyzes the synthesis of activated sulfate; Belongs to the APS kinase family.

Putative cysteine synthase-like protein; Evidence 3: Function proposed based on presence of conserved amino acid motif, structural feature or limited homology; Product type pe: putative enzyme.

Cystathionine gamma-lyase and homocysteine gamma-lyase for reverse transsulfuration pathway; Catalyzes the conversion of cystathionine to cysteine, and homocysteine to sulfide.

Uroporphyrinogen III and precorrin-1 C-methyltransferase; Catalyzes both methylations at C-2 and C-7 of uroporphyrinogen III leading to precorrin-1 and precorrin-2; their oxidative esterification gives respectively factor I octamethyl ester and sirohydrochlorin.

Cystathionine gamma-synthase and O-acetylhomoserine thiolyase; Catalyzes the formation of L-cystathionine from O-acetyl-L- homoserine and L-cysteine. Cannot use O-succinyl-L-homoserine as substrate. Also exhibits O-acetylhomoserine thiolyase activity, catalyzing the synthesis of L-homocysteine from O-acetyl-L-homoserine and sulfide.

Putative bifunctional P-450/NADPH-P450 reductase 1; Functions as a fatty acid monooxygenase. Catalyzes hydroxylation of a range of long-chain fatty acids, with a preference for long-chain unsaturated and branched-chain fatty acids over saturated fatty acids. Hydroxylation of myristic acid occurs mainly at the omega-2 position. Also displays a NADPH-dependent reductase activity in the C-terminal domain, which allows electron transfer from NADPH to the heme iron of the cytochrome P450 N-terminal domain. Is also able to catalyze efficient oxidation of sodium dodecyl sulfate (SDS).